Polishing-machine.



D. E. BIGELOW.

POLISHING MACHINE.

APPLICATION FILED 1211.29, 1913.

Patented Dec. 16, 1913.

2 SHEETS-SHEET 1.

Jana c ZlBy Z aw wi/imeooeo 0.. 1... "mam- D. E. BIGELOW.

POLISHING MACHINE.

APPLIGATION FILED APILZQ, 191s.

Patented Dec. 16, 1913 2 SHEETS-SHEET 2.

glwoewboz mam'zzs i iyweobeo 60 7 COLUMBIA PLANOGRAPH CD.,\VASHINGTON. D. c.

DANIEL E. BIGELOW, OF CLAREMOZRE, OKLAHOMA.

EOLISHING-MACHINE.

Specification of Letters Patent.

Patented Dec. 16, 1913.

Application filed April 29, 1913. Serial No. 764,468.

To all whom it may concern:

Be it known that I, DANIEL E. BIGELOW, a citizen of the United States, residing at Olaremore, in the county of Rogers and State of Oklahoma, have invented certain new and useful Improvements in Polishing- Machines, of which the following is a specification.

The invention relates to that class of stone polishing machines wherein the polishing member is power driven and is guided over the article to be polished by a manually operated arm, and is especially adapted for rubbing or polishing granite, marble or other stone.

The particular object of this invention is to provide a stationary polishing machine wherein the polishing member can be manipulated to move over a large area of stone surface and at the same time present said polishing member accurately to the surface of the stone.

A further object is to provide an adjusting mechanism for the control arm of the polisher, whereby said control arm can at all times be retained in a substantially horizontal position whether polishing a flat stone or one of greater height.

These and other objects hereinafter set forth are attained by the means illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the improved device. Fig. 2 is a detail vertical sectional view through the control-arm bearing. Fig. 8 is a horizontal sectional view on the line 33 of Fig. 1, and showing various positions of the polishing member in dotted lines, and Fig. 4 is a side view of the connecting link between the control-arm and the adjustment member.

Similar reference numerals in all of the figures of the drawings designate like parts.

Referring to the drawings, 5 designates a bracket for supporting the driving mechanism, said bracket adapted to be secured to a wall or other vertical support in any suitable manner and braced against lateral movement by the stays 6, one being secured on each side of said bracket. Said bracket 5 is constructed of any suitable material and is provided at its outer end with bearings 7 spaced apart, said bearings being provided with hard metal sleeves 8 and are supported in position by their flanges 9 which rest upon the upper surfaces of the bearings 7 A vertical driving shaft 10 is journaled in the sleeves 8, is adjustably supported therein by the collar 11 which is locked thereto by the set-screw 12, and has secured upon its lower end, a member of a universal joint 13, another member of said joint having depending therefrom the female member 1% of the telescoping connecting shaft. Male member 15 of the telescope connecting shaft is connected at its lower end to a member of a universal joint 16, another member of said joint 16 being secured to a shaft 17 journaled in a vertically disposed sleeve bearing 18 rigidly mounted on the control arm 19. Shaft 17 is connected to the polishing member 20 by the universal joint 21, thus when the articulated shaft formed by the several shafts with their universal connections is rotated the polishing member is caused to rotate. Any suitable driving means can be used for rotating said articulated shaft, in the present instance is shown the usual loose pulley 22 and the tight pulley 23, the same being mounted on the shaft 10 between the bearings 7.

Control arm 19 is provided with a handgrasp 2 1 to one side of the sleeve-bearing 18 and is extended on the other side of said bearing to pivotally connect by the bolt 25 with one end of a link 25 whose other end is slidably and pivotally mounted upon a rod 26 removably secured in a bracket 27 projecting from the main support or wall. Mounted to rotate in bracket 27 intermediate the rod 26 and support, is a screw 28 upon which is mounted a traveler 29 having threaded bearings in engagement with the screw, so that, when the screw is rotated, the traveler will move either up or down as desired. Said traveler is also slidably connected with rod 26 which prevents its rotating with the screw. The portion of the traveler which engages the rod 26 also engages the end of the link 25 that is slidably mounted on said rod to adjust the same. Therefore, when the screw is rotated the traveler is moved up or down carrying the link and the control arm therewith.

Link 25 is preferably bifurcated at its ends, as shown in Fig. 4, to form spaced bearings to engage the rod 26 and the control arm, thereby providing a hinge joint with each of said elements that will not sag. In other words, the control arm is held at all times substantially horizontal, and its sleeve-bearing 18 being vertical thereto, re-

mains always in a direct line above the polishing member. Therefore, when pressure is exerted upon the control arm, it is transmitted directly downward to the polishing member.

In operation, after the stone to be polished is positioned, the control arm is ad justed to a horizontal position according to the height of the stone and the driving belt shifted from the loose to the tight pulley. The operator then manipulates the control arm to position the polishing member to any portion of the surface of the stone until it is thoroughly polished.

The herein described construction allows of a wide range of movement, and as before stated, in whatever position the polishing member may be upon the stone, it Will lie in a direct vertical line below the sleevebearing 18, so that the pressure upon the control arm is transmitted directly down- Ward.

It will be understood that I do not wish to be limited to the kind of tool used in the apparatus, as it may be desirous to use an abrading tool instead of a polishing member.

Having thus fully described the invention, what is claimed is 1. An apparatus for the purpose described, comprising a supporting bracket, a driving shaft mounted to rotate therein, means for driving said shaft, a pivoted conl trol-arm, a telescopic connecting shaft between said driving shaft and control-arm, a polishing tool, andv means for supportlng said tool from said control-arm.

2. In an apparatus for the purpose described, a polishing tool, a horizontally disposed control arm for said tool, a vertically disposed sleeve-bearing rigidly fixed in said control-arm, a shaft in said sleeve, means for driving said shaft, and universal connections between said shaft and polishing tool and said driving means.

3. In an apparatus for the purpose described, a polishing tool, a hinged horizontally disposed control-arm for said tool, means for supporting said tool from said arm, means for vertically adjusting said arm, and. means for rotating said tool supporting means embodying a telescopic'shaft.

4:. In an apparatus for the purpose described, a polishing tool, a horizontally disposed control-arm for said tool, an adjusting means for said arm, a link pivoted to said adjusting means and one end of said control-arm, and means for rotating said tool embodying a telescopic shaft.

In testimony whereof I afiiX my signature in presence of two witnesses.

DANIEL E. BIGELOW. WVitnesses:

A. L. MINYARD, W. L. STRoDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

